Preheating shrinkage furnace and labeling equipment with preheating shrinkage furnace

Abstract

The utility model relates to a preheating shrinkage furnace and a labeling device, the preheating shrinkage furnace is provided with a furnace body, the furnace body comprises a top wall and two side walls and is arranged on a container conveying line in a crossing mode, the top wall and the two side walls define a preheating shrinkage channel in the furnace body, and the size of the preheating shrinkage channel is designed to at least allow a container to be conveyed and pass through. Wherein hot air cavities are formed in the two side walls respectively, a replaceable air outlet plate is arranged on the side, facing a container conveying line, of each hot air cavity, evenly-distributed air outlets are formed in the air outlet plates, and a hot air distribution mechanism is arranged on the top. And the hot air distribution mechanism is used for uniformly distributing hot air from the fan into the two hot air cavities. Hot air input from the top of the furnace body is dispersed to the hot air cavities formed in the two side walls through the hot air distribution mechanism, and then the hot air is evenly conveyed to a label arranged on the peripheral face of a container in a sleeving mode through the air outlet plate, so that the label is pre-shrunk under the action of the hot air and is reliably kept on the container.

Description

TECHNICAL FIELD

[0001] The utility model belongs to packaging machinery technical field, concretely relates to a kind of preheating shrinkage furnace and a kind of sleeve label equipment with the preheating shrinkage furnace. BACKGROUND

[0002] In sleeve label equipment, hot shrink label is usually first sleeved on container by sleeve label mechanism, and then container with label is transported to hot shrink furnace for heat shrinkage. In the process of transporting container with label to main hot shrink furnace, label can be displaced or even dropped. In addition, if label without pre-shrinkage is transported to main hot shrink furnace, it will be subjected to strong shrinkage, which often causes problems such as label distortion.

[0003] A PET film steam shrinkage method for hollow plastic bottle is known in the prior art, which comprises the following steps: placing the hollow plastic bottle sleeved with PET film into a pre-shrinkage furnace for steam pre-shrinkage to preliminarily shrink and form the PET film, wherein the steam used in the steam pre-shrinkage process of the pre-shrinkage furnace is transmitted from a main steam furnace; conveying the hollow plastic bottle subjected to steam pre-shrinkage to a cooling furnace for cooling; and conveying the cooled hollow plastic bottle to the main steam furnace for steam shrinkage to completely shrink the PET film.

[0004] However, the device required by the pre-shrinkage method using steam in the prior art is very complex, such as steam generator, steam transmission and distribution, and temperature control components. In addition, the energy consumption is very high, and the discharged steam and steam condensation will also affect the production environment. Therefore, the application of such pre-shrinkage device is greatly limited.

[0005] As a key equipment in heat shrink packaging process, the performance of pre-shrinkage furnace directly affects packaging efficiency and packaging quality. The existing pre-shrinkage furnace has deficiencies in hot air distribution, adjustment flexibility and heat energy utilization efficiency, and a pre-shrinkage furnace with more reasonable structure and superior performance is urgently needed.

[0006] Therefore, it is urgent to improve the pre-shrinkage furnace and the corresponding sleeve label equipment in the prior art to make the structure more reasonable, energy consumption lower, environment friendly and performance more superior. UTILITY MODEL CONTENTS

[0007] The utility model aims to provide a kind of preheating shrinkage furnace and the corresponding sleeve label equipment, and the preheating shrinkage furnace and the corresponding sleeve label equipment can realize pre-shrinkage of label sleeved on container in a simple structure, with energy saving and environment friendly, ensure that label is reliably maintained on container in the process of transmission and make subsequent shrinkage in main hot shrink furnace not too intense, avoid problems such as label distortion.

[0008] The above technical problem is solved by a pre-shrinking oven having an oven body comprising a top wall and two side walls and arranged in a transverse manner on a container conveying line, said top wall and two side walls defining a pre-shrinking channel inside the oven body, which is designed to at least allow the container to be conveyed therethrough, wherein a hot air chamber is formed in each of the two side walls, and a replaceable air outlet plate is arranged on a side of each hot air chamber facing the container conveying line, and a plurality of uniformly distributed air outlets are formed on said air outlet plate, and a hot air distribution mechanism is arranged on the top, which is arranged to uniformly distribute the hot air from a blower into the two hot air chambers. The hot air input from the top of the oven body is distributed by the hot air distribution mechanism into the hot air chambers formed in the two side walls, and then uniformly delivered by the air outlet plate to the label wrapped around the outer circumferential surface of the container, so that the label is pre-shrunk by the hot air and thus reliably retained on the container.

[0009] According to a preferred embodiment, a plurality of uniformly distributed through-holes or slits are designed on the air outlet plate. The positions of the through-holes or slits are adapted to the height and outer contour of the container, so that the hot air is accurately sprayed onto the label. The slits can also be designed in various ways, for example, vertically extending or obliquely extending.

[0010] Advantageously, a hot air blower is arranged on the top of the oven body, and the output end of the hot air blower is in communication with the hot air distribution mechanism through a sealed pipeline. Directly arranging the hot air blower on the top of the oven body can reduce heat loss and the corresponding connecting pipeline. Of course, the hot air blower can also be arranged away from the oven body, and the hot air is guided into the chamber in the oven body via the pipeline.

[0011] It is also preferred that the hot air distribution mechanism is designed in a triangular or inverted Y shape. In this way, the hot air distribution can be achieved with a simple structure.

[0012] Advantageously, the oven body is arranged above the container conveying line by means of a support mechanism that can be adjusted in the vertical and horizontal directions. In this way, the oven body can be easily adjusted in the vertical and horizontal directions to flexibly adapt to the container or label to be heat-shrunk.

[0013] It is also preferred that the hot air blower comprises a heating resistor assembly, a blower, and an adjusting assembly, by which the power of the heating resistor assembly and / or the blower can be adjusted. In this way, the temperature of the hot air and the flow rate of the hot air can be flexibly adjusted according to the actual needs, so that the pre-shrinking effect is achieved with optimal energy consumption.

[0014] It is also advantageous that a heat insulation shield or heat insulation sleeve is arranged around the pipeline for communicating the output end of the hot air blower with the hot air distribution mechanism. In this way, accidental touching and scalding of personnel are avoided.

[0015] According to a preferred scheme, the supporting mechanism comprises vertical supporting rods and horizontal supporting beams, wherein elongated positioning grooves are configured on the vertical supporting rods and the horizontal supporting beams, and scales are arranged on the long sides of the positioning grooves. Thus, the accurate adjustment of the furnace body can be realized with a simple structure.

[0016] It is also advantageous that a cord belt is hung at the inlet and outlet of the preheating shrinkage channel. Thus, the heat loss can be reduced to a certain extent, and the energy consumption is reduced.

[0017] The utility model also proposes a sleeving and labeling equipment, which comprises a bottle separating mechanism, a sleeving and labeling mechanism, and a main heat shrinkage furnace, wherein the preheating shrinkage furnace is arranged directly downstream of the sleeving and labeling mechanism.

[0018] In the preheating shrinkage furnace according to the application, the uniform distribution of hot air is realized by means of the hot air shunting mechanism, and the heat shrinkage effect is improved. In addition, the replaceable air outlet plate design facilitates the adjustment of the air outlet layout according to the container shape, and the adaptability is enhanced. The adjustment function of the supporting mechanism enables the furnace body position to be flexibly adjusted, meeting the needs of different production lines. The adjustment assembly and the heat insulation design of the hot air machine further improve the heat energy utilization efficiency and the safety of the equipment. In the sleeving and labeling equipment, the preheating shrinkage furnace is introduced, which can realize the pre-shrinking of the label sleeved on the container in a simple structure, in an energy-saving and environmentally friendly manner, ensure that the label is reliably kept on the container during the transmission process, and make the subsequent shrinking in the main heat shrinkage furnace not too severe, avoiding problems such as label distortion and deformation, and improving the overall sleeving and labeling effect and the stability of the sleeving and labeling quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the sleeving and labeling equipment with a preheating shrinkage furnace of the utility model from an oblique upper side;

[0020] Figure 2 is Figure 1 is a schematic view of the preheating shrinkage furnace in the

[0021] Figure 3 is a schematic view of the air outlet plate with different air outlet gaps. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model more clear and explicit, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0023] On existing labelling lines, the containers are usually transported one by one to the labelling position by means of a conveyor belt or a conveyor chain and the labelling is completed at the labelling position. The containers with labels are then transported to a main heat shrinkage oven for heat shrinkage to fix the labels to the containers. However, label deviation or falling off and the like are prone to occur during the transportation of the containers with labels to the main heat shrinkage oven. In addition, direct transportation of the containers with labels to the main heat shrinkage oven without pre-treatment means that the labels have to be subjected to severe shrinkage in the main heat shrinkage oven, sometimes resulting in distortion and affecting the labelling effect. The above problems can be avoided in a simple structure and in an energy-saving and environmentally friendly manner in the scheme disclosed in the utility model.

[0024] Figure 1 A schematic view of the labelling device with the pre-heat shrinkage oven 1 according to the utility model is shown from an oblique top view. The pre-heat shrinkage oven 1 is arranged across above the schematically shown conveying line 2. The conveying line is not the focus of the present application and is only schematically represented by reference numeral 2 here. The conveying line may, for example, be a conveyor belt or a conveyor chain and comprises corresponding turning mechanisms, drive mechanisms and control mechanisms. The conveying line is arranged, for example, on a rack which is not shown in detail. A pre-heat shrinkage channel 3 is constructed inside the pre-heat shrinkage oven 1, and the containers can be transported through the pre-heat shrinkage channel 3. That is, the pre-heat shrinkage channel 3 is designed in size, especially in height and width, to allow the containers to pass through. The length of the pre-heat shrinkage channel 3 is approximately equivalent to the length of 4-8 containers arranged side by side. Inside the pre-heat shrinkage channel 3, hot air is blown from air outlet plates 4 on both sides to the labels wrapped on the containers, so that the labels are partially shrunk. A hot air blower 5 is arranged above the pre-heat shrinkage oven 1. Advantageously, flexible curtain belts are hung at the entrance and the exit of the pre-heat shrinkage channel 3, so that heat loss can be reduced. The hot air blower 5 comprises a heating resistor assembly 6 and a blower 7. The hot air generated by the hot air blower 5 is delivered to the top of the heat shrinkage oven via a pipeline and is input to a hot air distribution mechanism in particular. The distributed hot air flows to the hot air cavities constructed in the two side walls respectively. The hot air distribution mechanism advantageously distributes the hot air to the hot air cavities on both sides of the conveying line 2. Replaceable air outlet plates 4 are arranged on the side of each hot air cavity facing the conveying line 2 of the containers, and uniform distribution of air outlets 8 is constructed on the air outlet plates 4. The hot air distribution mechanism is arranged at the top of the pre-heat shrinkage oven 1 and is designed to uniformly distribute the hot air from the blower to the two hot air cavities. Here, the hot air in the pre-heat shrinkage oven 1 only pre-shrinks, that is, only partially shrinks, the labels wrapped on the containers, so that the labels can be positionally fixed on the containers during the subsequent transportation process. At the same time, the one-time violent shrinkage in the main heat shrinkage oven is also avoided.

[0025] Although not shown, it is preferred that a heat shield or heat insulation sleeve is provided around the connecting line 9 of the hot air blower 5 to the hot air distribution device, in order to prevent scalding of persons who might accidentally touch it. In addition, a conspicuous warning sign, such as a red "do not touch" sign, can be provided on the connecting line 9. The hot air blower 5 further comprises a regulating assembly, by means of which the power of the heating resistor assembly 6 and the blower 7 in the hot air blower 5 can be regulated. The regulating assembly can be designed, for example, as a rotary knob. Thus, the air volume and the temperature can be adjusted according to the actual requirements. In addition, the heating resistor assembly makes it possible to dispense with a complex steam generator and the preceding conveying device, and thus eliminates the disadvantages of steam.

[0026] The furnace body of the pre-shrinking oven 1 is arranged above the container conveying line by means of a support device 10 which is adjustable in the vertical and horizontal direction. The support device 10 comprises vertical support bars and horizontal support beams, wherein elongated positioning slots are distributed over the vertical support bars and the horizontal support beams, and scales are provided on the long sides of the positioning slots. By means of the cooperation of the positioning slots and positioning pins or positioning bolts, an accurate adjustment of the furnace body can be achieved with a simple construction. Advantageously, two vertical support bars and two horizontal support beams are provided, wherein the positioning device is provided only on one vertical support bar and one horizontal support beam, and the other vertical support bar and the other horizontal support beam are only used for support.

[0027] Figure 2 The furnace body of the pre-shrinking oven 1 is shown separately. The front baffle of the furnace body is removed for clarity. The hot air blower 5 is arranged above the furnace body. However, the hot air blower 5 can also be arranged away from the furnace body and connected to the distribution device 11 by means of a connecting line. Although shown here as a triangle, the hot air distribution device can also be designed in other forms, such as an inverted Y or other possible shapes. Figure 2 It can be seen that the hot air distribution device 11 is triangular and that two hot air chambers 12, 13 are provided. The hot air blower 5 is arranged above the furnace body. However, the hot air blower 5 can also be arranged away from the furnace body and connected to the distribution device 11 by means of a connecting line. Although shown here as a triangle, the hot air distribution device can also be designed in other forms, such as an inverted Y or other possible shapes.

[0028] Figure 3 The air outlet plate 4 is shown fixed in a replaceable manner on the hot air chamber. The air outlet plate 4 is arranged in the hot air chamber 12, 13 in such a way that the air outlet openings 14 are directed towards the container conveying line. The air outlet plate 4 is designed in such a way that the air outlet openings 14 are arranged in a row and are directed towards the container conveying line. The air outlet plate 4 is designed in such a way that the air outlet openings 14 are arranged in a row and are directed towards the container conveying line. Figure 3Two different configurations of air outlet plates are shown in Fig. 1. Both air outlet plates 4 are provided with air outlets which are distributed evenly, but differ in shape and direction and arrangement of the air outlets. For example, in some embodiments the air outlets are designed as elongated slits, such as rectangular or oval slits. In other embodiments, the air outlets can be designed as air holes. In the design of the same pre-heat shrinkage oven, the two air outlet plates on both sides of the conveying path are preferably designed identically, but can also be designed differently if the profile of the container differs on both sides. In particular, the shape, size and arrangement of the air outlets in the air holes can be designed specifically for the shape and size of the container and the heat shrinkage properties of the label. For example, the position of the holes or slits is adapted to the height and outer contour of the container so that the hot air is accurately sprayed onto the label. This enables particularly good heat shrinkage.

[0029] The utility model discloses still a kind of sleeve label equipment. Sleeve label equipment can include bottle separating mechanism, sleeve label mechanism and main heat shrinkage oven, wherein, directly downstream of the sleeve label mechanism is equipped with the pre-heat shrinkage oven of the aforementioned. In the sleeve label equipment, by directly being equipped with pre-heat shrinkage oven downstream of sleeve label mechanism can timely at least partially heat shrinkage label that is sleeved on the outer periphery of container, so that it can reliably be kept on the outer periphery of container, even in subsequent link suffers various external interference, such as vibration, etc., all will not deviate from correct position. This aspect ensures sleeve label effect, on the other hand, entire sleeve label equipment can be operated at higher speed, because label that is sleeved on the outer part of container will not be displaced due to impact or vibration brought by high speed operation. In addition, since label has been partially shrunk in pre-heat shrinkage oven, thus only needs to suffer relatively gentle shrinkage process in main heat shrinkage oven, so that label as a whole will not be distorted, very symmetrical sleeve on container. Overall, by pre-heat shrinkage oven and corresponding sleeve label equipment can realize pre-shrinkage to label that is sleeved on container in simple structure, in energy-saving and environment-friendly manner, ensure that label reliably keeps on container in transmission process and make subsequent shrinkage in main heat shrinkage oven not too intense, avoid label distortion and other problems.

[0030] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0031] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A preheat shrinkage oven characterized by, The pre-shrinkage oven has an oven body comprising a top wall and two side walls and is arranged in a transverse manner on the container conveying line, the top wall and the two side walls defining a pre-shrinkage channel inside the oven body, the pre-shrinkage channel being sized to at least allow the container conveying to pass through, wherein a hot air cavity is respectively configured in the two side walls, a replaceable air outlet plate is respectively arranged on the side of each hot air cavity facing the container conveying line, a plurality of uniformly distributed air outlets are configured on the air outlet plate, and a hot air distribution mechanism is arranged on the top of the pre-shrinkage oven, the hot air distribution mechanism being arranged to uniformly distribute the hot air from the air blower into the two hot air cavities.

2. The preheat shrinkage oven according to claim 1, characterized in that, A plurality of uniformly distributed through holes or slits are designed on the air outlet plate.

3. Preheat shrinkage oven according to claim 1 or 2, characterized in that A hot air blower is arranged on the top of the oven body, and the output end of the hot air blower is communicated with the hot air distribution mechanism through a sealed pipeline.

4. The preheat shrinkage furnace according to claim 1 or 2, characterized by The hot air distribution mechanism is designed in a triangular or inverted Y shape.

5. The preheat shrinkage furnace according to claim 1 or 2, characterized by The oven body is arranged above the container conveying line by means of a support mechanism that can be adjusted in the vertical and horizontal directions.

6. The preheat shrinkage oven of claim 3, wherein The hot air blower comprises a heating resistor assembly, a blower, and an adjusting assembly, the power of the heating resistor assembly and / or the blower can be adjusted by the adjusting assembly.

7. The preheat shrinkage oven of claim 3, wherein A heat insulation shield or heat insulation sleeve is arranged around the pipeline for communicating the output end of the hot air blower with the hot air distribution mechanism.

8. The preheat shrinkage oven of claim 5, wherein, The support mechanism comprises a vertical support rod and a horizontal support beam, wherein elongated positioning grooves are configured on the vertical support rod and the horizontal support beam, and scales are arranged on the long sides of the positioning grooves.

9. The preheat shrinkage oven of claim 8, wherein, A cord belt is hung at the inlet and outlet of the pre-shrinkage channel.

10. A labelling apparatus characterised in that, The labeling device comprises a bottle separating mechanism, a labeling mechanism, and a main heat shrinkage oven, wherein the pre-shrinkage oven according to any one of claims 1-9 is arranged directly downstream of the labeling mechanism.

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